VQ37HR block limitations?

KingDavid · 08-31-2009, 03:54 AM

Size of turbo matters more than lbs of boost.

Orphan · 08-31-2009, 04:01 AM

I knew someone would mention that haha :P I guess it would be better to ask what kind of combustion pressure can the stock block handle. I haven't really had much experience with open deck blocks but closed deck seem more than happy to pack in quite a lot of air without any issue any idea what the limits of the VQ37 are?

KingDavid · 08-31-2009, 07:21 PM

Quote:

Originally Posted by Orphan

I knew someone would mention that haha :P I guess it would be better to ask what kind of combustion pressure can the stock block handle. I haven't really had much experience with open deck blocks but closed deck seem more than happy to pack in quite a lot of air without any issue any idea what the limits of the VQ37 are?

Well from what the vendors have been saying, it's not a good idea to go beyond 550whp. Although they have taken it past 600whp just fine.

Orphan · 09-01-2009, 06:00 AM

mrmixitup by all out do you mean just a stand alone ecu and wideband etc or do you mean a full bottom end build? If the bottom end build will you be keeping the 11.0:1 CR? Honestly from what i've seen if you can tune the factory ECU its better as you can retain factory features and past Nissan ECU's have been very easily tuned so I guess we will just have to see what comes out to tune it with. I'm sure NisRom or whatever will have a set up for the VQ37HR soon enough. Stand alone starts to get ahead when it comes to additional sensors or extra maps etc as most factory ECU's haven't been designed to expand on what they come with stock. I can't see any reason why the factory ECU wouldn't be fine for most builds not to mention save you the $2k for a good stand alone unit. I know older nissan ECU's can be made to work with a wideband so I would assume it should be possible with the VQ37HR as well.

Based on the internals from previous Nissan engines I would say 500rwhp would be about the safe maximum which is still pretty impressive, it means that 95% of people will be able to get their goals on the stock block.

I wonder what results will be had once people start fooling around with the VVEL on the intake cams, its a shame they didn't bother to put any valve control system on the exhaust side, I can see reason for it but I guess the cost/benifit wasn't in it by Nissans thinking or penny counting.

KingDavid · 09-01-2009, 11:53 AM

Quote:

Originally Posted by Orphan

mrmixitup by all out do you mean just a stand alone ecu and wideband etc or do you mean a full bottom end build? If the bottom end build will you be keeping the 11.0:1 CR? Honestly from what i've seen if you can tune the factory ECU its better as you can retain factory features and past Nissan ECU's have been very easily tuned so I guess we will just have to see what comes out to tune it with. I'm sure NisRom or whatever will have a set up for the VQ37HR soon enough. Stand alone starts to get ahead when it comes to additional sensors or extra maps etc as most factory ECU's haven't been designed to expand on what they come with stock. I can't see any reason why the factory ECU wouldn't be fine for most builds not to mention save you the $2k for a good stand alone unit. I know older nissan ECU's can be made to work with a wideband so I would assume it should be possible with the VQ37HR as well.

Based on the internals from previous Nissan engines I would say 500rwhp would be about the safe maximum which is still pretty impressive, it means that 95% of people will be able to get their goals on the stock block.

I wonder what results will be had once people start fooling around with the VVEL on the intake cams, its a shame they didn't bother to put any valve control system on the exhaust side, I can see reason for it but I guess the cost/benifit wasn't in it by Nissans thinking or penny counting.

The safe maximum is 550whp as per GTM and some vendors.

400hp N/A on a stock block seems very, very possible, lol. People are hitting 340-350whp with just I/H/E and a tune...CAn't wait for some more mods to come in and take it to that 400hp mark. ^_^

Orphan · 09-02-2009, 12:23 AM

I am quite impressed with the easy N/A performance out of them so far. Once a bit more time is spent on them I don't doubt 400whp N/A will be possible without going to extreme lengths.

Has anyone started working on the VVEL yet? Seems like once people can tune the VVEL there is an easy 5-10% more power on top of the basic mods.

KingDavid · 09-02-2009, 04:47 PM

Quote:

Originally Posted by Orphan

I am quite impressed with the easy N/A performance out of them so far. Once a bit more time is spent on them I don't doubt 400whp N/A will be possible without going to extreme lengths.

Has anyone started working on the VVEL yet? Seems like once people can tune the VVEL there is an easy 5-10% more power on top of the basic mods.

Whoa 400Whp is not what I said, lol. 400 at the crank. 400 to the wheels though? Maaannnnnn...That's crazy. That's V8 territory.

!xoible · 09-02-2009, 05:15 PM

Quote:

Originally Posted by KingDavid

The safe maximum is 550whp as per GTM and some vendors.

400hp N/A on a stock block seems very, very possible, lol. People are hitting 340-350whp with just I/H/E and a tune...CAn't wait for some more mods to come in and take it to that 400hp mark. ^_^

Quote:

Originally Posted by Orphan

I am quite impressed with the easy N/A performance out of them so far. Once a bit more time is spent on them I don't doubt 400whp N/A will be possible without going to extreme lengths.

Has anyone started working on the VVEL yet? Seems like once people can tune the VVEL there is an easy 5-10% more power on top of the basic mods.

i am very ignorant when it comes to tuning and so forth, but from a 330hp @ crank to 400 @ wheel without FI sounds like a joke to me. could you entertain me a bit and explain how anyone could reach 400 @ wheel without FI?

For the lack of better things to do I have been following M3's FI section on m3post.com. the engine puts over 350 hp at the wheel (414 at crank) and everyone finds it a stretch to even reach 400 hp without FI on that car...

edumacation, please!

08-31-2009, 04:01 AM	#2 (permalink)
Orphan Base Member Join Date: Aug 2009 Location: Brisbane Posts: 13 Drives: SC400 Rep Power: 16	I knew someone would mention that haha :P I guess it would be better to ask what kind of combustion pressure can the stock block handle. I haven't really had much experience with open deck blocks but closed deck seem more than happy to pack in quite a lot of air without any issue any idea what the limits of the VQ37 are? Last edited by Orphan; 08-31-2009 at 04:03 AM.

09-01-2009, 06:00 AM	#4 (permalink)
Orphan Base Member Join Date: Aug 2009 Location: Brisbane Posts: 13 Drives: SC400 Rep Power: 16	mrmixitup by all out do you mean just a stand alone ecu and wideband etc or do you mean a full bottom end build? If the bottom end build will you be keeping the 11.0:1 CR? Honestly from what i've seen if you can tune the factory ECU its better as you can retain factory features and past Nissan ECU's have been very easily tuned so I guess we will just have to see what comes out to tune it with. I'm sure NisRom or whatever will have a set up for the VQ37HR soon enough. Stand alone starts to get ahead when it comes to additional sensors or extra maps etc as most factory ECU's haven't been designed to expand on what they come with stock. I can't see any reason why the factory ECU wouldn't be fine for most builds not to mention save you the $2k for a good stand alone unit. I know older nissan ECU's can be made to work with a wideband so I would assume it should be possible with the VQ37HR as well. Based on the internals from previous Nissan engines I would say 500rwhp would be about the safe maximum which is still pretty impressive, it means that 95% of people will be able to get their goals on the stock block. I wonder what results will be had once people start fooling around with the VVEL on the intake cams, its a shame they didn't bother to put any valve control system on the exhaust side, I can see reason for it but I guess the cost/benifit wasn't in it by Nissans thinking or penny counting. Last edited by Orphan; 09-01-2009 at 06:06 AM.

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08-31-2009, 03:54 AM	#1 (permalink)
KingDavid Base Member Join Date: Mar 2009 Location: Miami Posts: 176 Drives: A car Rep Power: 17	Size of turbo matters more than lbs of boost.

09-02-2009, 12:23 AM	#6 (permalink)
Orphan Base Member Join Date: Aug 2009 Location: Brisbane Posts: 13 Drives: SC400 Rep Power: 16	I am quite impressed with the easy N/A performance out of them so far. Once a bit more time is spent on them I don't doubt 400whp N/A will be possible without going to extreme lengths. Has anyone started working on the VVEL yet? Seems like once people can tune the VVEL there is an easy 5-10% more power on top of the basic mods.